print(-3); # expect: -3
print(3); # expect: 3
print(-2000); # expect: -2000
print(2000); # expect: 2000

var i = 3;

print(i+5); # expect: 8
print(-i); # expect: -3
print(i); # expect: 3

var j = 2000;
print(-j); # expect: -2000
print(j); # expect: 2000